The variable region of an antibody occurs

A. only on the heavy chains.
B. only on the light chains.
C. on one of the light chains.
D.
on all four chains.


D

Biology & Microbiology

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A hypothetical family of proteins consists of six similar but different proteins. Each of the six proteins can form transcription factors by forming homo- or heterodimers in combinatorial mixtures, each binding to different regulatory sites

Calculate the number of different dimeric structures that can be formed from the six proteins (and, thus, potential number of different regulatory sites that can be bound).

Biology & Microbiology

In the natural population of black widowbirds, there is some variation in tail length. Tail

length is an inherited trait; the versions of this trait that result in different lengths are called __________.

a. genomes b. adaptations c. phenotypes d. alleles

Biology & Microbiology

Natural selection is a quick and effective way of eliminating harmful alleles from the population

a. True b. False

Biology & Microbiology

When cells stop responding to normal controls over

growth and division they a. begin to form a tumor. b. produce a malignancy. c. start to die. d. kill surrounding cells. e. produce scar tissue.

Biology & Microbiology